[gnome-builder/wip/gtk4-port] libide/tree: fix markup for tooltip

[Christian Hergert <chergert src gnome org>]

commit a535c5e064c8c9c22586fcc81bdd24cd909c8feb
Author: Christian Hergert <chergert redhat com>
Date:   Mon May 9 15:25:25 2022 -0700

    libide/tree: fix markup for tooltip

 src/libide/tree/ide-tree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/libide/tree/ide-tree.c b/src/libide/tree/ide-tree.c
index acc87219a..272c25a86 100644
--- a/src/libide/tree/ide-tree.c
+++ b/src/libide/tree/ide-tree.c
@@ -510,8 +510,8 @@ ide_tree_query_tooltip (GtkWidget  *widget,
           if (node != NULL)
             {
               gtk_tree_view_set_tooltip_row (tree_view, tooltip, path);
-              gtk_tooltip_set_text (tooltip,
-                                    ide_tree_node_get_display_name (node));
+              gtk_tooltip_set_markup (tooltip,
+                                      ide_tree_node_get_display_name (node));
               return TRUE;
             }
         }